William Arnott (September 5, 1832 – May 26, 1907) was an American farmer and politician.
In 1876, Arnott served in the Wisconsin State Assembly as a Republican.
Arnott died in Stevens Point, Wisconsin.
The unincorporated community of Arnott, Wisconsin was named after him.
This article about a Republican Party member of the Wisconsin State Assembly born in the 1830s is a stub.